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TX73H32ACP is a highly integrated, high-performance transmitter device for ultrasound imaging system. The device has a total of 32 pulser circuits, 32 transmit/ receive switches (referred to as T/R or TR switches) and supports on-chip beamformer (TxBF). The device also integrates on-chip floating power supplies that reduce the number of required high-voltage power supplies.

Feature of TX73H32ACP

32-channel 3-level pulser and active transmit/ receive (T/R) switch

Maximum output voltage: ±100V

Minimum output voltage: ±2V

Maximum output current: 2A

True return to zero to discharge output to ground

Second harmonic of –43dBc at 5MHz

–3-dB Bandwidth with 220Ω || 220pF load

19MHz for a ±100V supply

Very low receive power: 0.4mW/ch

Turn on resistance of 13Ω

Turn on and Turn off time: 100ns

Transient glitch: 20mVPP

Channel based T/R switch on and off controls

Delay resolution: half beamformer clock period, minimum 2.5ns

Maximum delay: 214 beamformer clock period

Maximum beamformer clockspeed: 200MHz

On-Chip RAM for pattern and delay profile

One 512 × 32 memory to store beam-former pattern and delay for a group of 2 channels

Global repeat feature present, enabling long-duration patterns

High-speed (400MHz maximum), 2-lane LVDS serial programming interface.

Low programming time: ≈1µs for delay profile update

32-bit Checksum to detect wrong SPI writes

Supports CMOS serial programming interface (50MHz maximum)

High-reliability features:

Internal temperature sensor and automatic thermal shutdown

No specific power sequencing requirement

Error flag register to detect faulty conditions

Integrated passives for the floating supplies and bias voltages

Small package: FC-BGA-196 (12mm × 12mm) with 0.8mm pitch

Applications of TX73H32ACP

Ultrasound imaging system

Piezoelectric driver

In-probe ultrasound imaging

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